Fire can help people in many ways. But it can also be very harmful. Fire can heat water, warm your houses, give light, and cook food. But fire can burn things too. It can burn trees, houses, animals, or people. Sometimes big fires can burn forests.

Nobody knows for sure how people began to use fire. But there are many interesting old stories about the first time a man or woman started a fire. One story from Australia tells about a man a long time ago. He went up to the sun by a rope and brought fire down.

Today people know how to make a fire with matches（火柴）．Children sometimes like to play with them. But matches can be very dangerous. One match can burn a piece of paper, and then it might burn a house. A small fire can become a big fire very fast.

Fires kill many people every year. So you must be careful with matches. You should also learn to put out fires. Fires need oxygen（氧气）．Without oxygen they die. There is oxygen in the air. Cover a fire with water, sand, or with your coat or something else in an emergency（紧急情况）．This keeps the air away from a fire and kills it.

Be careful with fire, and it will help you. Be careless with fire, and it will burn you.

1．Which of the following is true?

 A．We are not sure how people started to use fire

 B．It is not an Australian who started a fire.

 C．We know how people began to use fire.

 D．Nobody knows how to make a fire

2．Children mustn’t play with matches because_______.
 A．matches burn paper           B．it is not interesting

 C．matches can be dangerous     D．they don’t know how to make a fire with matches

3．If you are going to put out (扑灭) a fire,　you       .

 A．must be careful with matches        B．ought to know it can be useful

 C．have to cover it with water only     D．should keep air away from it

4．We must be careful with fire, or it _______.

A．can die            B．warms our houses 

C．might burn us       D．will heat water

5．What is the main idea of the passage?

A．Fire can not help people in many ways. 

B．Fire can be both helpful and harmful.

C．We shouldn’t use matches in our life.    

D．We must be careful with matches.

Tom appeared on the sidewalk with a bucket of whitewash and a long-handled brush. He stopped by the fence in front of the house where he lived with his aunt Polly. He looked at it, and all joy left him. The fence was long and high. He put the brush into the whitewash and moved it along the top of the fence. He repeated the operation. He felt he could not continue and sat down.
He knew that his friends would arrive soon with all kinds of interesting plans for the day. They would walk past him and laugh. They would make jokes about his having to work on a beautiful summer Saturday. The thought burned him like fire.
He put his hand into his pockets and took out all that he owned. Perhaps he could find some way to pay someone to do the whitewashing for him. But there was nothing of value in his pockets —nothing that could buy even half an hour of freedom. So he put the bits of toys back into his pockets and gave up the idea
At this dark and hopeless moment, a wonderful idea came to him. It filled his mind with a great, bright light. Calmly he picked up the brush and started again to whitewash.
While Tom was working, Ben Rogers appeared. Ben was eating an apple as he walked along the street. As he walked along, he was making noises like the sound of a riverboat. First he shouted loudly, like a boat captain. Then he said “Ding-Dong-Dong”, “Ding-Dong-Dong” again and again, like the bell of a riverboat. And he made other strange noises. When he came close to Tom, he stopped.
Tom went on whitewashing. He did not look at Ben. Ben stared a moment and then said: “Hello! I’m going swimming, but you can’t go, can you?”
No answer. Tom moved his brush carefully along the fence and looked at the result with the eye of an artist. Ben came nearer. Tom’s mouth watered for the apple, but he kept on working.
Ben said, “Hello, old fellow, you’ve got to work, hey?”
Tom turned suddenly and said, “Why, it’s you, Ben! I wasn’t noticing.”
“Say —I’m going swimming. Don’t you wish you could? But of course you’d rather work — wouldn’t you? Of course you would.”
Tom looked at the boy a bit, and said “What do you call work?”
“Why, isn’t that work?”
Tom went back to his whitewashing, and answered carelessly.
“Well, maybe it is, and maybe it isn’t. All I know is, it suits Tom Sawyer.”
“Oh come, now, you don’t mean to say that you like it?”
The brush continued to move.
“Like it? Well, I don’t see why I shouldn’t like it. Does a boy get a chance to whitewash a fence every day?”
Ben stopped eating his apple. Tom moved his brush back and forth, stepped back to look at the result, added a touch here and there, and stepped back again. Ben watched every move and got more and more interested. Soon he said,
“Say, Tom, let me whitewash a little.”
Tom thought for a moment, was about to agree; but he changed his mind.
“No —no —it won’t do, Ben. You see, Aunt Polly wants this fence to be perfect. It has got to be done very carefully. I don’t think there is one boy in a thousand, maybe two thousand, that can do it well enough.”
“No —is that so? Oh come, now —let me just try. Only just a little.” “Ben, I’d like to, but if it isn’t done right, I’m afraid Aunt Polly … ”
“Oh, I’ll be careful. Now let me try. Say —I’ll give you the core of my apple.”
“Well, here —No, Ben, now don’t. I’m afraid …”
“I’ll give you all of it.”
Tom gave up the brush with unwillingness on his face, but joy in his heart. And while Ben worked at the fence in the hot sun, Tom sat under a tree, eating the apple, and planning how to get more help. There were enough boys. Each one came to laugh, but remained to whitewash. By the time Ben was tired, Tom sold the next chance to Billy for a kite; and when Billy was tired, Johnny bought in for a dead rat —and so on, hour after hour. And when the middle of the afternoon came, Tom had won many treasures.
And he had not worked. He had had a nice idle time all the time, with plenty of company －and the fence had been whitewashed three times. If he hadn’t run out of whitewash, Tom would have owned everything belonging to his friends.
He had discovered a great law of human action, namely, that in order to make a man or a boy want a thing, it is only necessary to make the thing difficult to get.
【小题1】How many characters are mentioned in this story?

It was Saturday when the entire summer world was bright and fresh. Tom looked at the fence, which was long and high, feeling all enthusiasm leaving him. He dipped his brush into the whitewash before moving it along the top board of the fence. He knew other boys would arrive soon with all minds of interesting plans for this day. As walking past him, they would tease him for having to work on a beautiful Saturday—which burnt him like fire.
He, putting his hands into his pockets and taking out all he owned with the expectation of letting someone paint, found nothing that could buy half an hour of freedom. At this dark and hopeless moment, a wonderful idea occurred to him, pouring a great bright light into his mind. He took up his brush and continued to work pleasantly with calm and quietness.
Presently, Ben Rogers came in sight—munching an apple and making joyful noises like the sound of a riverboat as he walked along. Tom went on whitewashing, paying no attention to the steamboat. 
“Hello!” Ben said, “I’m going swimming, but you can’t go, can you?”
No answer. Tom moved his brush gently along the fence and surveyed the result. Ben came nearer. Tom’s mouth watered for Ben’s apple while he kept painting the fence.
Ben said, “That’s a lot of work, isn’t it?”
Tom turned suddenly saying “Here you are! Ben! I didn’t notice you.”
“I’m going swimming,” Ben said. “Don’t you wish you could go? Or would you rather work?”
Tom said, “Work? What do you mean ‘work’?”
“Isn’t that work?”
Tom continued painting and answered carelessly, “Maybe it is, and maybe it isn’t. All I know is it suits Tom Sawyer.”
“Do you mean that you enjoy it?”
“I don’t see why I oughtn’t to enjoy it.”
“Does a boy have a chance to paint a fence frequently” said Tom.
Ben stopped munching his apple.
Tom moved his brush back and forth—stepped back to note the effect—added a little paint here and there. Ben watched every move, getting more and more interested, more and more absorbed1. After a short time, he said, “Tom, let me whitewash a little.”
Tom seemed to be thinking for a moment before he said, “No, Aunt Polly wants this fence to be perfect. If it was the back fence, maybe you could do it. But this fence beside the street is where everybody can see it. It has to be done right.”
“Oh, come on, let me try. I’ll be careful. Listen, Tom. I’ll give you part of my apple if you let me paint.”
“No, Ben, I’m afraid—”
“I’ll give you all the apple!”
Tom handed the brush to Ben with unwillingness on his face but alacrity in his heart. While the riverboat worked and sweated in the hot sun, Tom, an artist sat in the shade close by, munching his apple, and planning how he could trick more of the boys.
Before long there were enough boys each of whom came along the street; stopped to laugh but soon begged to be allowed to paint. By the middle of the afternoon, Tom had got many treasures while the fence had had three layers of whitewash on it. If he hadn’t run out of whitewash, he would have owned everything belonging to the boys in the village.
Tom said to himself that the world was not so depressing after all. He had discovered a great law of human action: in order to make a man cover a thing, it is only necessary to make the thing difficult to attain.
【小题1】By using “Tom continued painting and answered carelessly”, the author shows Tom ______ when he was talking to Ben.

If you do not use  your arms or your legs for some time, they will become weak; when you start using them again, they will slowly become stronger again．Everybody knows that ．yet many people do not seem to know that memory works in the same way．When someone says that he has a good memory, he really means that he keeps his memory in practice by using it．
When someone else says that his memory is poor, he really means that he does not give it enough chance to become strong．If a friend says that his arms and legs are weak, we know that it is his own fault．But if he tells us that he has a poor memory, many of us think that his parents are to blame, and few of us know that it is just his own fault．Have you ever noticed that some people can’t read or write but usually they have better memories? This is because they cannot read or write so they have to remember things; they cannot write them down in a little notebook．They have to remember days, names, songs and stories; so their memories are being exercised the whole time．So if you want to have a good memory, learn from these people:Practise remembering．
【小题1】One has a poor memory mainly because       ．